Tread portion of an automobile tire



FIG. 1 is a perspective view of top, front and one side of the tread portion of an automobile tire showing my new design, it being understood that the tread pattern repeats uniformly throughout the circumference of the tire;

FIG. 2 is a front elevational view thereof, the top and bottom plan views beings identical thereto;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is an enlarged fragmentary front elevational view thereof; and,

FIG. 7 is a cross-sectional view thereof taken along the line 7-7 as shown in FIG. 6.

The elements shown in broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a tread portion of an automobile tire, as shown and described. 